#5B66CF#5B66CF
#5B66CF is a mid, vivid blue. Relative luminance 0.162; OKLCH L 55.6% C 0.160 H 275.4°. Best body text is #FFFFFF at 4.95:1 contrast (WCAG AA passes).
Color values
| HEX | #5B66CF |
|---|---|
| RGB | rgb(91, 102, 207) |
| HSL | hsl(234, 55%, 58%) |
| HSV | hsv(234, 56%, 81%) |
| CMYK | cmyk(56%, 50.7%, 0%, 18.8%) |
| CIE-LAB | lab(47.28, 26.26, -55.85) |
| CIE-LCH | lch(47.28, 61.72, 295.18°) |
| OKLab | oklab(55.56% 0.0151 -0.1596) |
| OKLCH | oklch(55.56% 0.16 275.4) |
| XYZ | xyz(20.3246, 16.2305, 61.0812) |
| Luminance | 0.1623 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Dark Periwinkle
#665FD1
ΔE00 3.44
Royal Blue
#4169E1
ΔE00 4.39
Cornflower Blue
#5170D7
ΔE00 4.43
Warm Blue
#4B57DB
ΔE00 5.12
Slate Blue
#6A5ACD
ΔE00 5.30
Iris
#6258C4
ΔE00 5.35
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#5B66CF #CFC45B
analogous
#5BA0CF #5B66CF #8A5BCF
triadic
#5B66CF #CF5B66 #66CF5B
tetradic
#5B66CF #CF5BA0 #CFC45B #5BCF8A
square
#5B66CF #CF5BA0 #CFC45B #5BCF8A
split-complementary
#5B66CF #CF8A5B #A0CF5B
monochromatic
#283188 #3642B7 #5B66CF #8A92DD #BABEEB
Accessibility & contrast
On white
4.95
#5B66CF on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
4.25
#5B66CF on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #5B66CF
4.95:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##5B66CF | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##5B66CF | 1.00 | 4.95 | 4.25 | 4.95 |
| #FFFFFF | 4.95 | 1.00 | 21.00 | 1.00 |
| #000000 | 4.25 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 4.95 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2F75D3
Deuteranopia (green-blind)
#1A6BCD
Tritanopia (blue-blind)
#197E91
Achromatopsia (no color)
#707070
Design tokens & code
CSS
--color: #5b66cf; /* rgb */ color: rgb(91, 102, 207); /* oklch */ color: oklch(55.6% 0.160 275.4);
Tailwind
colors: {
custom: {
50: '#9291de',
500: '#5b66cf',
950: '#000000',
},
}SCSS
$custom: #5b66cf; $custom-light: #9291de; $custom-dark: #000000;
JSON
{
"hex": "#5b66cf",
"rgb": {
"r": 91,
"g": 102,
"b": 207
},
"hsl": {
"h": 234.31,
"s": 54.717,
"l": 58.431
},
"oklch": {
"l": 0.55563,
"c": 0.16035,
"h": 275.4
},
"luminance": 0.16232
}Semantic roles & 50–950 ramp
primary
#5B66CF
secondary
#DAD6AC
accent
#D04ADE
background
#F9F8FD
surface
#F2F0FB
border
#CCCBD4
text
#0E0C15
muted
#7E7D83